Pad Mounted

7/17/2019 Pad Mounted

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Distribut ion Transformers

Functional Specification Guide

Three-Phase Pad-Mounted Compartmental Type PS202002EN

1 of 15 • September 2015 • Replaces G210-12-1 August 2013©2015 Eaton. All Rights Reserved.

Functional Specification for Three-Phase Pad-Mounted DistributionTransformers 45 – 10,000 kVA

1.0 Scope

1.1. This specification covers the electrical and mechanical characteristics of Eaton’sCooper Power series 45-10,000 kVA Three-Phase Step-Down Pad-MountedDistribution Transformers. KVA ratings for transformers with secondary voltages notexceeding 700V are 45-3,750 kVA, while kVA ratings for transformers with secondaryvoltages greater than 700V are 1,000-10,000 kVA. Product is per Catalog Data

CA202003EN.

2.0 Appl icable Standards

2.1. All characteristics, definitions, and terminology, except as specifically covered in thisspecification, shall be in accordance with the latest revision of the following ANSI®,IEEE®, NEMA®, and Department of Energy standards.

IEEE Std C57.12.00™-2010 standard – Standard for Standard General Requirementsfor Liquid-Immersed Distribution, Power, and Regulating Transformers.

IEEE Std C57.12.28™-2014 standard – Pad-Mounted Equipment - Enclosure Integrity.

IEEE Std C57.12.34™-2009 standard – Standard Requirements for Pad-Mounted,Compartmental-Type, Self-Cooled, Three-Phase DistributionTransformers (2500 kVA and Smaller) - High Voltage: 34500GrdY/19920Volts and Below; Low-Voltage: 480 Volt 2500 kVA and Smaller (issued inMarch 2005 - combines IEEE Std C57.12.22 and IEEE Std C57.12.26standards).

IEEE Std C57.12.90™-2010 standard – Standard Test Code for Liquid-ImmersedDistribution, Power, and Regulating Transformers and IEEE Guide for

Short-Circuit Testing of Distribution and Power Transformers.

IEEE Std C57.12.91™-2011 standard – Guide for Loading Mineral-Oil-ImmersedTransformers.

NEMA TR 1-1993 (R2000) – Transformers, Regulators and Reactors, Table 0-2 AudibleSound Levels for Liquid-Immersed Power Transformers.



Three-Phase Pad-mounted Compartmental Type PS202002EN


NEMA 260-1996 (2004) – Safety Labels for Pad-Mounted Switchgear and TransformersSited in Public Areas.

10 CFR Part 431 – Department of Energy – Energy Conservation Program: EnergyConservation Standards for Distribution Transformers; Final Rule.

3.0 Ratings

3.1. The transformer shall be designed in accordance with this specification and the kVArating shall be:

45, 75, 112.5, 150, 225, 300, 500, 750, 1000, 1500, 2000, 2500, 3000, 3750, 5000,7500, 10,000 (range may also be specified).

3.2. The primary voltage, configuration, and the basic lightning impulse insulation level (BIL)shall be ___________, {make a selection from Table 1} Dual voltages are alsoavailable.

3.3. The secondary voltage, configuration, and the basic insulation level (BIL) of thesecondary voltage shall be ___________, {make a selection from Table 1}

Table 1

Ratings for Three-Phase Transformers(Single Ratio)

Primary Voltage BIL (kV) Secondary Voltage BIL (kV)

2400 Delta4160 Delta4800 Delta7200 Delta12000 Delta12470 Delta13200 Delta13800 Delta14400 Delta16430 Delta34500 Delta43800 Delta4160GrdY/24008320GrdY/480012470GrdY/7200

13200GrdY/762013800GrdY/797022860GrdY/1320023900GrdY/1380024940GrdY/1440034500GrdY/1992043800GrdY/25300

606060759595959595

125150250607595

9595

125125125150250

208Y/120480Y/277575Y/332600Y/347690Y/398240 Delta480 Delta240 Delta with 120 Mid-Tap480 Delta with 240 Mid-Tap

See left column for voltagesover 700 V

All 30 kV

• For complete connector rating, see IEEE Std 386™-2006 standard.• Transformers are suitable for connectors with phase-to-ground or phase-to-ground/phase-to

phase high-voltage ratings as listed.





• Arrester coordination may require higher BIL on multiple connections than indicated to achieve aminimum protection level of 20%.

3.4. The transformer may be furnished with full capacity high-voltage taps. The tap changershall be clearly labeled to reflect that the transformer must be de-energized beforeoperating the tap changer as required in Section 4.3 of IEEE Std C57.12.34™-2009standard. The tap changer shall be operable on the higher voltage only for transformerswith dual voltage primaries. The unit shall have one of the following tap configurations:

No TapsTwo – 2 ½% taps above and below rated voltage (split taps)Four – 2 ½% taps below rated voltage (four below)NEMA taps (14400, 13800, 13200, 12470, 12540)Non-standard tap configuration

The applicable tap configuration shall be specified on the inquiry.

3.5. The average winding temperature rise above ambient temperature, when tested at thetransformer rating, shall not exceed 65 °C OR shall not exceed 55 °C OR at the basetransformer rating, shall not exceed 55 °C, and when tested at 112% of the base rating,shall not exceed 65 °C.

3.6. The percent impedance voltage, as measured on the rated voltage connection, shall beper Table 2. For target impedances, the tolerance on the impedance shall be +/- 7.5%of nominal value for impedance values greater than 2.5%. The tolerance on theimpedance shall be +/- 10.0% for impedance values less than or equal to 2.5%.

Table 2

Percent Impedance Voltage

KVA Rating (Low voltage < 700 V) Impedance

75 1.10 - 5.75112.5-300 1.40 - 5.75

500 1.70 - 5.75750-3750 5.75 nominal

KVA Rating Low voltage > 700 V (all nominal values) ≤150 kV BIL 200 kV BIL 250 kV BIL

1000 - 5000 5.75 7.00 7.507500 - 10000 6.50 7.00 7.50

4.0 Construction





4.1. The core and coil shall be vacuum processed to ensure maximum penetration ofinsulating fluid into the coil insulation system. While under vacuum, the windings will beenergized to heat the coils and drive out moisture, and the transformer will be filled withpreheated filtered degassed insulating fluid. The core shall be manufactured from burr-free, grain-oriented silicon steel and shall be precisely stacked to eliminate gaps in the

corner joints. The coil shall be insulated with B-stage, epoxy coated, diamond pattern,insulating paper, which shall be thermally cured under pressure to ensure properbonding of conductor and paper. Coils shall be either aluminum or copper (eliminate ametal if one is required over the other).

4.2. The dielectric coolant shall be listed less-flammable fluid meeting the requirements ofNational Electrical Code Section 450-23 and the requirements of the National ElectricalSafety Code (IEEE Std C2™-2002 standard), Section 15. The dielectric coolant shall benon-toxic*, non-bioaccumulating and be readily and completely biodegradable per EPAOPPTS 835.3100. The base fluid shall be 100% derived from edible seed oils and foodgrade performance enhancing additives. The fluid shall not require genetically altered

seeds for its base oil. The fluid shall result in zero mortality when tested on trout fry *.The fluid shall be certified to comply with the US EPA Environmental TechnologyVerification (ETV) requirements, and tested for compatibility with transformercomponents. The fluid shall be Factory Mutual Approved®, UL® Classified DielectricMedium (UL-EOUV) and UL® Classified Transformer Fluid (UL-EOVK), Envirotemp™ FR3™ fluid.*(Per OECD G.L. 203)

4.3. Tank and Cabinet Enclosure

4.3.1. The high-voltage and low-voltage compartments, separated by a metal barrier, shallbe located side-by-side on one side of the transformer tank. When viewed from thefront, the low-voltage compartment shall be on the right. Each compartment shallhave a door that is constructed so as to provide access to the high-voltagecompartment only after the door to the low-voltage compartment has been opened.There shall be one or more additional fastening devices that must be removedbefore the high-voltage door can be opened. Where the low-voltage compartmentdoor is of a flat panel design, the compartment door shall have three-point latchingwith a handle provided for a locking device. Hinge pins and associated barrels shallbe constructed of corrosion-resistant material, passivated ANSI® Type 304 or theequivalent.

4.3.2. A recessed, captive, penta-head or hex-head bolt that meets the dimensions perIEEE Std C57.12.28™-2014 standard shall secure all access doors.

4.3.3. The compartment depth shall be in accordance with IEEE Std C57.12.34™-2009standard, unless additional depth is specified.

4.3.4. The tank base must be designed to allow skidding or rolling in any direction. Liftingprovisions shall consist of four lifting lugs welded to the tank.





4.3.5. The tank shall be constructed to withstand 7 psi without permanent deformation, and15 psi without rupture. The tank shall include a 15 psig pressure relief valve with aflow rate of minimum 35 SCFM.

4.3.6. The exterior of the unit shall be painted Munsell 7GY3.29/1.5 green (STD), ANSI® 70

gray, or ANSI

®

61 gray in color. If a special paint color is specified, a federal specnumber or paint chip must be provided at the time of order. The cabinet interior andfront plate shall be painted gray for ease of viewing the inside compartment.

4.3.7. The tank shall be complete with an anodized aluminum laser engraved nameplate.This nameplate shall meet Nameplate B per IEEE Std C57.12.00™-2010 standard.

4.4. High Voltage Bushings and Terminals

4.4.1. High voltage bushings will be installed in the high voltage termination compartmentlocated on the front left of the transformer and requiring access via the low voltage

termination compartment on the front right.

4.4.2. Bushing Style

[ ] 15/25 KV DEADFRONT, CURRENTS BELOW 200 AMPS: The high voltagebushings shall be 15/25 kV 200A bushing wells with bushing well inserts installed.The bushings shall be externally removable and be supplied with a removablestud (Re: Catalog Data CA800016EN, 500-12, and 500-26).

[ ] 35 KV DEADFRONT, CURRENTS BELOW 200 AMPS: The high voltage bushingshall be a one-piece, 150 kV, 200-amp large interface load-break bushing (Re:Catalog Data CA800021EN).

[ ] 15/25/35 KV DEADFRONT, CURRENTS ABOVE 200 AMPS: The high voltagebushing shall be a 600A dead-break primary one-piece bushing externallyremovable, 3Ø rated, integral design. An optional 900 A bushing is available uponrequest (Re: Catalog Data CA800025EN and CA800020EN).

[ ] 36 KV TO 46 kV (250 KV BIL) DEADFRONT APPLICATIONS: The high voltagebushing shall be a CONNEX® Plug-in Cable Termination System, size 3S. Themale and female portions of the bushing shall be supplied with the transformer.

Available in radial feed only.

[ ] 15/25/35 KV LIVEFRONT, 200 KV BIL MAX: The high voltage bushing shall be aporcelain bushing with a two, four, or six-hole spade or an eyebolt connector.

4.4.3. Bushing Configuration

[ ] 15/25 KV RADIAL FEED DEADFRONT: The transformer shall be provided withthree (3) high voltage bushings in accordance with Figure 1 dimensions (Figure4a dimensions may be specified when a larger termination compartment forgreater working space is desired) from IEEE Std C57.12.34™-2009 standard for





radial feed configurations. The bushing heights shall be in accordance with Figure3 dimensions (Figure 6 dimensions may be specified for greater bushing height)of IEEE Std C57.12.34™-2009 standard.

[ ] 15/25 KV LOOP FEED DEADFRONT: The transformer shall be provided with six

(6) high voltage bushings in accordance Figure 2 dimensions (Figure 5adimensions may be specified when a larger termination compartment for greaterworking space is desired) of IEEE Std C57.12.34™-2009 standard for loop feedconfigurations. The bushing heights shall be in accordance with Figure 3 minimumdimensions (Figure 6 dimensions may be specified for greater bushing height) ofIEEE Std C57.12.34™-2009 standard.

[ ] 35 KV RADIAL FEED DEADFRONT: The transformer shall be provided withthree (3) high voltage bushings in accordance with Figure 4b dimensions of IEEEStd C57.12.34™-2009 standard for radial feed configurations. The bushingheights shall be in accordance with Figure 6 dimensions of IEEE Std

C57.12.34™-2009 standard.

[ ] 35 KV LOOP FEED DEADFRONT: The transformer shall be provided with six (6)high voltage bushings in accordance with Figure 5c dimensions of IEEE StdC57.12.34™-2009 standard for loop feed configurations. The bushing heightsshall be in accordance with Figure 6 dimensions of IEEE Std C57.12.34™-2009standard.

[ ] 46 KV / 250 KV BIL DEADFRONT: The transformer shall be provided with three(3) bushings mounted 45° down from the horizontal, 60” from the ground, and 12”apart from each other.

[ ] 15/25/35 KV LIVEFRONT, 150 KV BIL MAX: The transformer shall be providedwith three (3) bushings in accordance with Figure 9 of IEEE Std C57.12.34™-2009 standard for radial feed configurations. The bushing heights shall be inaccordance with Figure 10 of IEEE Std C57.12.34™-2009 standard.

[ ] 200 KV BIL LIVEFRONT: The transformer shall be provided with three (3)bushings with phase-to-phase and phase-to-ground clearances adequate for 200kV BIL.

4.5. Low Voltage Bushings and Terminals

4.5.1. Bushing Style

4.5.1.1. Voltages less than 700 Volts: The transformer shall be provided with tin-plated spade-type bushings for vertical takeoff. The spacing of the connectionholes shall be 1.75” on center, per IEEE Std C57.12.34™-2009 standardFigure 13a. The quantity of connection holes shall be 4, 6, 8, 12, 16, or 20holes.





4.5.1.2. Transformers 300 kVA and below, and 500 kVA with 480Y/277 secondary willhave two-piece low voltage bushings with studs and screw on spades.Transformers 500 kVA with 208Y/120 secondary and all transformers above500 kVA will have one-piece bushings.

Table 3Standard / Maximum Bushing Hole Quantities

KVA 208Y/120 480Y/277 and higher45-300 4 standard, 16 maximum 4 standard, 16 maximum500 6 standard, 12 maximum 4 standard, 16 maximum750-1500 12 standard, 20 maximum 6 standard, 12 maximum2000-3750 N/A 12 standard, 20 maximum(Re: Catalog Data CA800017EN, CA800023EN, and CA800018EN)

4.5.1.3. Bushing supports shall be provided for transformers requiring 10 or moreconnection holes. Bushing supports shall be affixed to the cabinet sidewalls;tank-mounted supports mountings are not acceptable.

4.5.2. Bushing Configuration

The transformer shall be provided with bushings in a staggered arrangement inaccordance with Figure 11a dimensions (Figure 12a dimensions may be specifiedwhen a larger termination compartment for greater working space is desired) of IEEEStd C57.12.34™-2009 standard.

4.5.3. Voltages greater than 700 Volts: Refer to section 3.1 for the bushing type.Secondary arrangements shall be live-front or dead-front. Dead-front application witha required neutral shall have a porcelain X0 bushing. Dead-front application may beloop feed when specified. Provide additional front barrier for high voltage live frontsecondary, creating an additional barrier after the low voltage door has beenopened.

4.6. Switching

[ ] Primary Switching: The primary switching scheme provided with the transformershall be one (only available option for radial feed), two, or three on-off under-oilload-break switch(s), or one four-position V or T-blade load-break sectionalizingswitch. Refer to Appendix 1 for the schematics of these switching options (Re:Catalog Data CA800005EN and CA800019EN).

[ ] Make-before-break option for four-posi tion, sectionalizing switch: This switch option provides improved system reliability by eliminatingmomentary interruptions during switching operations.

[ ] External Visible Loadbreak On/Off switch:





The external visible loadbreak switch allows customers to visiblyconfirm that the transformer is de-energized without having to exposethemselves to dangerous arc flash in the transformer compartment.

[ ] External Visible Loadbreak On/Off/Ground switch

The external visible loadbreak switch allows customers to visiblyconfirm that the transformer is de-energized without having to exposethemselves to dangerous arc flash in the transformer compartment.This feature also allows the end user to ground the transformer usingthe load break switch.

Note: The external load-break switch can also be supplied with externalgauges mounted outside of the transformer cabinet. Refer to Section 9for the gauges included with this option.

4.7. Overcurrent Protection

[ ] BAY-O-NET WITH BACK-UP CURRENT LIMITING FUSES: (available up to 130amps of full-load transformer current, up to 34.5 kV grounded wye, or 23 kVdelta). The high-voltage overcurrent protection scheme provided with thetransformer shall be an externally removable loadbreak expulsion Bay-O-Net fuseassembly with a flapper valve to minimize oil spillage. The bayonet fuses shall bein series with ELSP under-oil partial-range current-limiting back-up fuses with aninterrupting rating of 50,000 A. (Re: Catalog Data CA132015EN, CA132009EN,CA132010EN, CA132012EN, CA132011EN, CA132007EN, and CA132013EN)For voltages 23000Y or Delta and above (which must also take into account anyhigher tap settings), bayonet fuses are not available.

[ ] Cartridge fusing, >23kV: Under-oil cartridge fusing shall be utilized(available up to 208 amps of full-load transformer current, up to 34.5kVdelta). The high-voltage overcurrent protection scheme provided withthe transformer shall be under-oil cartridge fusing. Cartridge fuses shalbe in series with ELSP under-oil partial-range current-limiting back-upfuses with an interrupting rating of 50,000 A.

[ ] Optional Accessory: An interlock shall be required between the load-break switch scheme specified and the bayonet fuses, such that thefuses may not be removed unless the transformer has been de-energized via the load-break switch scheme.

[ ] MAGNEX INTERRUPTER: (available up to 42 amps of full-load transformercurrent, up to 35 KV grounded wye, or 17.1 KV delta), The high-voltageovercurrent protection scheme provided with the transformer shall be a three-phase trip MagneX interrupter. This externally resettable device may also be usedas an on-off switch. The three-phase MagneX interrupter shall be in series withELSP under-oil partial-range current-limiting back-up fuses with an interruptingrating of 50,000 A (Re: Catalog Data CA132017EN and CA132013EN).





[ ] INTEGRAL VACCUUM, FAULT INTERRUPTER (VFI): (available from 13 ampsup to 900 amps of full-load transformer current, up to 34.5 kV, grounded wye ordelta, maximum 150 KV BIL) The high-voltage or low-voltage overcurrentprotection scheme provided with the transformer shall be an integral VacuumFault Interrupter (VFI). The VFI shall have a maximum interrupting rating of

12,000A RMS symmetrical (optional 16,000 A RMS symmetrical available at 15KV) with resettable fault protection up through 35 kV. The VFI shall also include aTri-Phase electronic breaker control with over 100 minimum trip settings and five(5) selectable time current curves. The minimum trip setting shall be XX amps,and curve profile shall be the EF, KF, TF, F, or H (Re: Bulletin B210-02039 andService Information S285-75-1 for the electronic control).

[ ] Optional ELSP Accessory: VFI shall be in series with ELSP under-oilpartial-range current-limiting back-up fuses with an interrupting ratingof 50,000 A.

[ ] Optional VFI Accessories: SCADA board; Ground fault detection;Motor operator assembly; Visible break window.

4.8. Overvoltage Protection

4.8.1. The overvoltage protection scheme provided with the transformer shall protect thehigh-voltage or low voltage winding.

[ ] DEAD-FRONT BUSHINGS: (maximum 150 kV BIL, for voltages up to 18 kV deltaand 35 kV grounded wye). Externally mounted, Distribution Class M.O.V.E. Dead-front elbow arresters shall be supplied. (Re: Catalog Data 235-65.) M.O.V.E.arresters are for installation on 200 A rated dead-front bushing interfaces only. Iftransformer bushings are rated 600 A or 900 A, BT-TAP elbow connectors, T-OPII elbow connectors, or 600 A bushing adapters, each with a load-reducing tapplug for arrester connection, are required (Re: Catalog Data CA235018EN andCA235012EN).

[ ] LIVEFRONT BUSHINGS: (up to 200 KV BIL). Distribution- and Intermediate-Class arresters shall be supplied beneath the high-voltage bushings (Re: CatalogData CA235018EN and CA235012EN).

[ ] UNDER OIL: (for voltages up to 27 kV delta and 35 KV grounded wye). Internallymounted, Distribution Class MOV under-oil surge arresters shall be supplied (ReCatalog Data CA235023EN).

[ ] Optional Accessory: Three (3) disconnect switches shall be includedto disconnect the under-oil arresters from ground for transformertesting (Re: Catalog Data 800-51).

5.0 Optional features to reduce exposure to arc flash





5.1. Additional transformer rating nameplate – In addition to the standard nameplate locatedon the transformer tank, a second nameplate shall be included. The nameplate shall bemounted external to the termination compartments with an industrial grade double-sidedadhesive. Its location shall be identified on the data sheet.

5.2. External drain valve with sampler – A 1.0” drain valve with sampling device shall belocated outside of the cable compartment on the [low voltage] [high voltage] side of thetank. The valve shall be protected by a hinged cover with padlock provisions.

5.3. External instrumentation package – All included gauges and instrumentation devicesshall be located outside of the cable compartments such that access to them does notrequire exposure to any live circuits. They shall be located inside a separate NEMA® 4rated enclosure on the [low voltage] [high voltage] side of the tank. Devices shall includethe following: liquid level gauge, dial-type thermometer, pressure/vacuum gaugepressure relief valve, ½” fluid sampling valve, [temperature transducer], [pressuretransducer], [winding temperature indicator], [rapid rise relay], [upper fill plug/valve].

5.3.1. Alarm contacts [shall] [shall not] be included on the liquid level gauge, dial-typethermometer, and pressure/vacuum gauges. Any of the accessories above withcontacts shall be wired [to terminal blocks located within the enclosure] [via liquid-tight flexible conduit to a terminal block in a [NEMA® 4] [NEMA® 4X] control boxlocated below the instrument box].

5.4. External load break switch – The high voltage switch handle shall be located on theexterior tank wall on the high voltage side of the transformer. The switch shall beoperable without exposure to any live circuits. The handle shall be protected by ahinged cover with padlock provisions.

5.5. External visible load break (EVLB) switch – The high voltage switch shall be located onthe exterior tank wall on the high voltage side of the transformer and shall include aviewing window that provides visible confirmation of the switch blade position. Theswitch shall be of a [2-position, on/off] [3-position, on/off/ground] configuration and shalbe operable without exposure to any live circuits. Hinged covers with padlock provisionsshall be provided over the window and over the switch handle. Properly sized current-limiting fuses shall be included in the transformer for additional safety.

Note: The EVLB option is limited to the following ratings:

Line voltage (kV) Maximum kVA

≥ 12.0 ≤ 34.5 3000

≥ 7.2 < 12.0 2000

≥ 4.16 < 7.2 1000





5.5.1. For additional safety and ease of maintenance, the following instrumentation devicesshall be located on the front of the external load break switch compartment: liquidlevel gauge, dial-type thermometer, pressure/vacuum gauge, pressure relief valveand ½” fluid sampling valve. These devices shall be protected by a hinged coverwith padlock provisions.

Note: If alarm contacts are required a second set of gauges shall be provided in thelow voltage cable compartment with the contacts wired to a terminal block on themetal divider between the compartments.

5.6. Infrared (IR) inspection windows – To monitor connections in the high voltage and lowvoltage compartments without opening the compartment doors, IR window shall beprovided. The window(s) shall be IRISS model VPFR-75 or approved equal. Thequantity and location of the window(s) shall be indicated on the data sheets.

6.0 Labeling

6.1. A temporary bar code label shall be attached to the exterior of the transformer inaccordance with IEEE Std C57.12.34™-2009 standard.

7.0 Finish Performance Requirements

7.1. The tank coating shall meet all requirements in IEEE Std C57.12.28™-2014 standardincluding:

• Salt Spray• Crosshatch adhesion• Humidity• Impact• Oil resistance• Ultraviolet accelerated weathering• Abrasion resistance – taber abraser

7.2. The enclosure integrity of the tank and cabinet shall meet the requirements for tamperresistance set forth in IEEE Std C57.12.28™-2014 standard including but not limited tothe pry test, pull test, and wire probe test.

8.0 Production Testing

8.1. All units shall be tested for the following:

• No-Load (85 °C or 20 °C) losses at rated current• Total (85 °C) losses at rated current• Percent Impedance (85 °C) at rated current• Excitation current (100% voltage) test• Winding resistance measurement tests• Ratio tests using all tap settings





• Polarity and phase relation tests• Induced potential tests• Full wave and reduced wave impulse test

8.2. Transformers shall conform to efficiency levels for liquid immersed distribution

transformers, as specified in the Department of Energy ruling “10 CFR Part 431 EnergyConservation Program: Energy Conservation Standards for Distribution Transformers;Final Rule; April 18, 2013.” Manufacturer shall comply with the intent of all regulationsset forth in noted ruling.

8.3. In addition, the manufacturer shall provide certification upon request for all design andother tests listed in IEEE Std C57.12.00™-2010 standard, including verification that thedesign has passed short circuit criteria per IEEE Std C57.12.00™-2010 standard andIEEE Std C57.12.90™-2010 standard.

8.4. In the event of proposal bid evaluated with guaranteed losses due to a loss evaluation

(see section 10.0), manufacturer shall conform to guaranteed average losses asspecified in IEEE Std C57.12.00™-2010 standard. The no-load losses of a transformershall not exceed the specified no-load losses by more than 10%, and the total losses of atransformer shall not exceed the specified total losses by more than 6%.

9.0 Approved Manufacturers

9.1. Eaton—Waukesha WI

10.0 Accessories

10.1. The following accessories and options shall be provided:

[ ] Bolted main tank cover (1000 kVA & below)[ ] Welded main tank cover with bolted handhole (1500 kVA & above) [ ] 1.0” upper fill plug[ ] 1.0” drain plug in LV compartment (500 kVA & below)[ ] 1.0” drain valve w/ sampling device in LV compartment (750 kVA & above)[ ] Automatic pressure relief valve[ ] Metal drip shield (when bayonets specified)[ ] 20” deep cabinet (2500 kVA & below)[ ] 24” deep cabinet (3000 kVA & above)

[ ] Ground provisions per IEEE Std C57.12.34™-2009 standard section 9.11.[ ] Meet NEMA® TR-1 sound levels[ ] Liquid level gauge [ ] Dial-type thermometer gauge [ ] Pressure vacuum gauge [ ] 1.0” drain valve w/ sampling device in (LV or HV) compartment (500 kVA & below)[ ] Upper fill valve [ ] Pressure vacuum bleeder [ ] 24” deep cabinet





[ ] 30” deep cabinet[ ] 36” deep cabinet[ ] 40” deep cabinet [ ] Spare bayonet fuse links [ ] Fault indicator provisions

[ ] Ground connectors[ ] Mr. Ouch warning & danger signs[ ] Danger high voltage warning signs[ ] Miscellaneous stenciling[ ] Non-PCB decal[ ] Touch-up paint [ ] Interphase barriers (for live front primary units only) [ ] Seismic zone 3 and 4 tank anchoring

[ ] Complete 304L stainless steel tank and cabinet[ ] 304L stainless steel tank base and cabinet sides & sill (partial)[ ] Liquid level gauge with auxiliary contacts

[ ] Dial-type thermometer gauge with auxiliary contacts [ ] Pressure vacuum gauge with auxiliary contacts[ ] Current or potential transformers[ ] Rapid rise relay with seal-in panel[ ] Winding temperature indicator[ ] Watt-hour meter package – includes GE kV2c Encompass™ Electronic Meter.

Factory supplied wiring shall be internal to the cabinet, not in conduit.Communication connection shall be the OPTOCOM port.

[ ] Harmonic resistant K-factor design, K=4, 9, 13, or 20

[ ] Forced air ONAF (mineral oil) or KNAF (Envirotemp™ FR3™ fluid) rating. Forcedair rating requires documentation from Eaton’s customer that they are aware thistransformer is no longer tamper resistant and is no longer in compliance with

ANSI® standards.

[ ] Future forced air rating[ ] Forced Air Fan Control Package [ ] FM Global® (FM) Approved transformer (to comply with NEC® 450-23 listing

restrictions for installations on, near, or inside of buildings) [ ] Combination UL® Listed & Classified transformer (to comply with NEC® 450-23

listing restrictions for installations on, near, or inside of buildings) per UL XPLH

[ ] UL® Listed transformer (certifying compliance with ANSI® standards only) per UL®

XPLH[ ] External visible break with gauges: Gauges include liquid level, dial-type

thermometer gauge, pressure/vacuum, pressure relief valve, and a 1.0” oilsampler valve, and fill plug.

11.0 Optional Transformer Evaluation

[ ] No unit evaluation, but include quote losses as reference only on bid.[ ] Unit loss evaluation, guaranteed average losses. Criteria to properly evaluate

quoted losses:• Core loss evaluation (A-factor) ____ $/watt





• Winding loss evaluation (B-factor) ____ $/watt(Eaton may be contacted for sample loss evaluation method)

12.0 Shipping

12.1. Transformers, 1000 kVA and below, shall be palletized. Transformers, 1500 kVA andlarger, shall be loaded and unloaded with overhead cranes, so a pallet is not to beprovided for these transformers.

13.0 Data With Proposal

13.1. The following data shall be submitted with the proposal:

• Core losses (when requested per Sections 7.4 and 10.0).• Winding losses (when requested per Sections 7.4 and 10.0).• Percent Impedance

• Typical bid drawing• Approval drawing – drawings shall show final dimensions and features. When

requested, approval drawings shall be provided per quoted leadtime.• Record Drawing – drawings shall show final dimensions and features. When

requested, record drawings shall be provided.

14.0 Service

14.1. The manufacturer of the transformer shall have regional service centers located withintwo (2) hours flight time of all contiguous 48 states. Service personnel shall be factorytrained in commissioning and routine service of quoted transformers.





APPENDIX 1: Switching Options and Schematics

1 On/Off Switch 2 On/Off Switches 3 On/Off Switches

(Re: Catalog Data CA800019EN)

4-position sectionalizing switches:V-blade switch

Description of positions:Feed from A & BFeed from A onlyFeed from B only

Open — the loop is open and the transformer is de-energized

T-blade switch

Description of positions:Feed from A & BFeed from A onlyFeed from B onlyOpen — the loop is closed and the transformer is de-energized

(Re: Catalog Data CA800005EN)

Documents

Pad Mounted